* {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 14px;
  }
  #app {
    width: 500px;
    padding: 10px;;
    margin: 30px auto;
  }
  
  .control {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
  }
  
  .control .search {
    display: inline-block;
    width: 300px;
    height: 25px;
    padding-left: 10px;
    border-radius: 4px;
    border: 1px solid #ccc;
  }
  
  .control .option {
    color: #3e86f4;
    font-size: 14px;
    margin-left: 10px;
    padding: 0 5px;
    border-radius: 4px;
    cursor: pointer;
  }
  
  .control .option.active {
    color: #fff;
    background-color: #3e86f4;
  }
  
  
  .person {
    display: flex;
    align-items: center;
    padding-bottom: 10px;
    padding-top: 10px;
    border-bottom: 1px solid #ccc;
  }
  
  .avatar {
    margin-right: 10px;
    vertical-align: middle;
  }
  
  .avatar img {
    width: 50px;
    height: 50px;
  }
  
  .content {
    display: flex;
    flex-direction: column;
  }
  
  .content .des {
    color: #aaa;
    font-size: 10px;
    margin-top: 5px;
  }